[3.13] gh-123046: Fix regexp to catch cases where the module name is omitted from the weakref repr (GH-123047) (#123058)

gh-123046: Fix regexp to catch cases where the module name is omitted from the weakref repr (GH-123047)
(cherry picked from commit 786cac0c64dc156dfee817e87f15ae56b7e3ed00)

Co-authored-by: Kirill Podoprigora <kirill.bast9@mail.ru>
Co-authored-by: sobolevn <mail@sobolevn.me>